/***************************************************************************
 *   Copyright (C) 2007 by Sebastian Trueg <trueg@kde.org>                 *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
 ***************************************************************************/

#include <config-kmetadata.h>

#include "metadatawidget.h"

#include <klocale.h>

#include <QLabel>
#include <QGridLayout>
#include <QTextEdit>

#ifdef HAVE_KMETADATA
#include <kmetadatatagwidget.h>
#include <kmetadata/resourcemanager.h>
#include <kmetadata/file.h>
#include <kratingwidget.h>
#include <kmetadatatagwidget.h>
#endif


bool MetaDataWidget::metaDataAvailable()
{
#ifdef HAVE_KMETADATA
    return !Nepomuk::KMetaData::ResourceManager::instance()->init();
#else
    return false;
#endif
}


class MetaDataWidget::Private
{
public:
#ifdef HAVE_KMETADATA
    void loadComment( const QString& comment ) {
        editComment->blockSignals( true );
        if ( comment.isEmpty() ) {
            editComment->setFontItalic( true );
            editComment->setText( i18n( "Click to add comment..." ) );
        }
        else {
            editComment->setFontItalic( false );
            editComment->setText( comment );
        }
        editComment->blockSignals( false );
    }

    KUrl fileUrl;

    Nepomuk::KMetaData::File file;

    QTextEdit* editComment;
    KRatingWidget* ratingWidget;
    Nepomuk::KMetaData::TagWidget* tagWidget;
#endif
};


MetaDataWidget::MetaDataWidget( QWidget* parent )
    : QWidget( parent )
{
    d = new Private;

#ifdef HAVE_KMETADATA
    d->editComment = new QTextEdit( this );
    d->tagWidget = new Nepomuk::KMetaData::TagWidget( this );
    d->ratingWidget = new KRatingWidget( this );
    connect( d->ratingWidget, SIGNAL(ratingChanged(int)), this, SLOT(slotRatingChanged(int)) );
    connect( d->editComment, SIGNAL( textChanged() ), this, SLOT( slotCommentChanged() ) );

    QVBoxLayout* lay = new QVBoxLayout( this );
    lay->setMargin( 0 );
    QHBoxLayout* hbox = new QHBoxLayout;
    hbox->addWidget( new QLabel( i18n( "Rating:" ), this ) );
    hbox->addStretch( 1 );
    hbox->addWidget( d->ratingWidget );
    lay->addLayout( hbox );
    lay->addWidget( d->editComment );
    hbox = new QHBoxLayout;
    hbox->addWidget( new QLabel( i18n( "Tags:" ), this ) );
    hbox->addWidget( d->tagWidget, 1 );
    lay->addLayout( hbox );

    d->editComment->installEventFilter( this );
    d->editComment->viewport()->installEventFilter( this );
#endif
}


MetaDataWidget::~MetaDataWidget()
{
    delete d;
}


void MetaDataWidget::setFile( const KUrl& url )
{
#ifdef HAVE_KMETADATA
    d->fileUrl = url;
    d->file = Nepomuk::KMetaData::File( url.url() );
    d->file.setLocation( url.url() );
    d->ratingWidget->setRating( d->file.getRating() );
    d->tagWidget->setTaggedResource( d->file );
    d->loadComment( d->file.getComment() );
#endif
}


void MetaDataWidget::setFiles( const KUrl::List urls )
{
#ifdef HAVE_KMETADATA
    // FIXME: support multiple files
    setFile( urls.first() );
#endif
}


void MetaDataWidget::slotCommentChanged()
{
#ifdef HAVE_KMETADATA
    d->file.setComment( d->editComment->toPlainText() );
#endif
}


void MetaDataWidget::slotRatingChanged( int r )
{
#ifdef HAVE_KMETADATA
    d->file.setRating( r );
#endif
}


bool MetaDataWidget::eventFilter( QObject* obj, QEvent* event )
{
#ifdef HAVE_KMETADATA
    if (  obj == d->editComment->viewport()
          || obj == d->editComment ) {
        if ( event->type() == QEvent::FocusOut ) {
            // make sure the info text is displayed again
            d->loadComment( d->editComment->toPlainText() );
        }
        else if ( event->type() == QEvent::FocusIn ) {
            d->editComment->setFontItalic( false );
            if ( d->file.getComment().isEmpty() )
                d->editComment->setText( QString() );
        }
    }
#endif

    return QWidget::eventFilter( obj, event );
}

#include "metadatawidget.moc"